It is best to only add the milk after the espresso is chilled,
or add when you are ready to drink.
If the frappuccino is too strong, just drink some and add more milk until it looks like
a Starbucks Frappuccino
(see below)

The basic ingredients on the back of the container are:
coffee
milk
sugar
pectin (to ‘thicken’ the mixture)

Whole milk will help thicken the mixture.
The pectin does not add flavor so it is not required.

Drinking it out of a real Starbucks Frappuccino bottle helps with the
WOW, this is JUST like a $2.49 one!